I do this in a strong trend. I want to be long euro for example, but in a strong, long trend, dips can either be shallow (due to the exuberant bullish momentum) or deep (still within the overall trend)
For this reason, I often scale in, buying the shallow dips, adding to the deeper dips (cheaper price, better bargain), stops below the major support zone.
Not for everyone, but provided MM is good, it's safe, it works and it makes money
